Injector



(Ismael.)A

v2 Sheets-fSheet 1.

L SCHUTTB.

anyl 1,1883

Patented M N4 PETERS. PhalLilhugrnpmr. Washinglen. D. C.

.'(Model.) 2 sheets-'sheet 2.

fL. SGHUTTB.

` INJBGTOR. l, y No. 276,898. Patented May 1,1883.

8 l G l [Imam/5f f UNITED STATES PATENTN OFFICE.

LoUIs scHurTE, on PHILADELPHIA, PENNSYLVANIA.

INJECTOR.

SPECIFICATION forming ,part of Letters Patent No. 276,898, daf-.ea May1, 1883.

Application filed February ll, 1883. (Model.)

To all whom it may concern:

Be it known that I, LOUIS SGHU'ITE, of Philadelphia,in the countyofPhiladel pha and State of Pennsylvania, have invented certainImprovements in Steam-Jet Injectors, &c., of which the following isaspeci'tication.

My present invention relates to starting and relief valves on injectorsand other steam-jet apparatus for the forcing ot' liquids and tlnids,

and more particularly those that may be `sub jected to suddencounter-pressures exceeding the nominal counter-pressure which they havebeen constructed to overcome.

The accompanying drawingsillustrate an injector or stealnjet apparatusof simple form having my improvements embodied therein.

Figure l is a longitudinal section ofthe apparatus and valve attached.Fig. 2 represents a cross-section on thecenter-line x .fr of the valve,showing the valve-seat, discharge, and overflow passage. I"ig.3 shows anelevation, partly in section, ot' the apparatus in a modifled form. Withreference to Figs. 1 and 2, I will explain its action.

The principal parts ot' the apparatus are the steam-nozzle A,combining-tube B, delivery# tube C, steam-inlet I), Water-inlet E, anddischarge F, all 'of substantially the usual form and arrangement.

Gr is the starting and relief valve, which, with its connections, formsthe subject of the present invention. 'lhe valve G, opening from thedischarge F ot' the instrument outward, carries on its outer end apiston, H, working in a cylinder, and beyond this a stem, I, with awasher and nut, against which a spring, K, acts upward, so that if noother influence is brought to bear on the valve the action ot' thisspring will cause it to be kept open. If, however, suicient pressure isapplied on top of the piston H, the valve will close against thepressure from the discharge-pipe F, exerted against the under side ot'the valve Gr. The spac'e above the valve and below the pistoncommunicates with the waste or overiiow passage L. By applying ontop ofpiston H the same steam-pressure as that under which the injector orsteam-jet apparatus is operated, and by properly proportioning the areaof the piston H and the valve Gr, the valve can be made to open as soonas the pressure in the discharge end ot' the instrument exceeds thatbearing a lixed relation to the steam-pressure, and will remain closedor will close whenever it is lower than would be admissible asdetermined by the relation ot' areas and pressures.

Among cases where such an instrument will find useful application isthatot -feedinga nest ot` boilers where the admission to each boiler canbe regulated or closed separately, where it may occur that thejdischargefrom the instru` ment may temporarily be greatly contracted or entirelyclosed, in which case the counter; pressure in the discharge will risetill it opens the discharge-valve, and the instrument will continue towork, discharging through the passage L. Another case is that where theinstrument is used as a ireengine, where a bend or obstruction in thehose or a closing of the discharge-nozzle may cause all excessivepressure, in which case the relief-valve will open and allow of acontinuous working ot' r the apparatus.

as shown in the accompanying drawings. Re,

ferring to these connections, asshownin Fig-1, M is a passage from thesteam-supply, opening into a small steam-chamber, N, containing aslidevalve, O. P is a passage leading from beneath the slide-valve tothe waste or overtlow L. rEhe slidevalve has its rod or stem connectedto the operatingstem of the ma'in Steamadmission valve.

In the position ofthe parts shown in the IOC l paratus, will be readilyunderstood.

The slide-valve 0 is made sufficiently long or the connection vbetvveenit and the operatingstem of main valve has sufficient lost motion toadmit ot the main valve being'opened sufficiently to bring the apparatusinto action before a change in the communication from above the pistonwith the waste-passage is eiected, while a further movement cuts offthis communication and opens the passage P through M with thesteam-chamber, thereby placing a pressure on the piston and closing thevalve G. In this way it will be seen that a ready starting ot theinstrument can be effected through the valve G at all times, while itacts at the same time as a relief-valve inthe event of the pressure ot'the discharge becoming higher in proportion to the governingsteampressure than that limited by the proportionate areas of valve andpiston.

Fig. 3, showing a modified form of the ap- It has the leading parts forthe same purpose as explained with regard to Fig.A 1. In this case thevalve G isplaced below and connected with the piston H by means of alever, 1t. The object ot' this moditication is to reduce the area ofthesteam-piston H, which controls the opening and closing of the valve. Theadmission I of steam on this piston is in this case effected by athree-way cock or valve, O, Which, Whenv closed against the steam,communicates with the atmosphere, thereby relieving thepressure 'romunder the piston. This starting and relief valve may be advantageouslyapplied to any form of steam-jet apparatus or injector, be it doubletube, self-adjusting, or any other. A diaphragm may be substituted forthe piston H. The valve may also be separate from the body of theinjector, and simply connected thereto by pipes or other suitable means.

The present invention is restricted to those matters and things whichare hereinafter claimed, and as to all matters which may be described orshown, but which are not claimed, the right is reserved to make the samethe subject of a separate application.

Having thus described myinvention, what I claim is 1. In a jetapparatusfor the forcing of liquids or iiuids, an overowyalve, substantially asdescribed, arranged to be acted upon on one side by the pressure of thedischarge and on the other side by the pressure of the steam or fluid bywhich the apparatus is operated, whereby an excessive counter-pressureor resistance causes the automatic opening of the overflow-valve.

2. In a steamjet apparatus, substantially such as shown, anoveriioW-valve communicating with the discharge end and subject to thepressure of the outgoing fluid, combined with a closing-piston having anarea greater than that of the valve, and a conductor or passage wherebythe pressure ot the steam or actuating-duid is applied to hold theovertlow 'normally in a closed position.

3. In a steam-jetapparatusfor moving fluids, a main valve for admittingthe-actuating-steam to the apparatus, an overiiovv and starting valve atthe delivery end, a piston to close the overflow-valve, and a valveconnected and arranged to admit steam behind the piston after theopening of the main valve, substantially as described, whereby theoverflow-valve is relieved from the closing-pressure and permitted toremain open until alter the apparatus has been set in action.

4. In a jet apparatus for moving Huids, the combination of theoverflow-valve, the piston to close the same, the passages P Q, and thevalve O, acting in connection With said passages and with thesteam-supply.

5. In a steam-jet apparatus, an overflow relief-valve constructed andarranged, substantially as described, to receivel upon its outer sideaiiuid-pressure .in excess of the normal pressure of the fluiddischarged by the apparatus.

6. In a jet apparatus of the character'hereiu represented, thecombination ot the valve Gr, -9

Witnesses:

JOHN D. YANON. J AMES E. CLARK.

